FCP Rendering CPU Usage

Hi Guys,

Apologies of there is a simple answer to this that I am unaware of.

I have a new 8 core Mac Pro and am currently editing a project in FCP 6.0.2 with mixed DV and HDV source material (mostly DV, delivery as DV).

I have DV sequences with render control set to Pro Res to render the HDV bits down as and when I want to. Now aside from the well discussed issues about the ways to work with HDV and DV, I actually want to know this...

Although the rendering I'm doing isn't completely horrific, it seems to often be about 1:1 ratio of time of clip to time to render (so if I'm going to render a minutes worth of footage, it'll take a minute to render). This doesn't feel like a huge step up from my MBP 2.33 Dual Core.

A quick look at activity monitor reveals that my machine only appears to be using 35% of my CPU (according to activity monitor) to do this, leaving the rest idle (I am running nothing else in the background other than the OS). Surely this new machine should be using a lot more of it's available power than that for all these bits of rendering?